ab·scis·sa  (āb-sĭs'ə)   (click for larger image in new window) n. Symbol x2 pl. ab·scis·sas or ab·scis·sae (-sĭs'ē) The coordinate representing the position of a point along a line perpendicular to the y-axis in a plane Cartesian coordinate system. [New Latin (līnea) abscissa, (line) cut off, from Latin abscissa, feminine of abscissus, past participle of abscindere, to abscise; see abscise.] |